manhatten中modifier一章中练习的问题

pepys1985

People (that are well-informed) know that Bordeaux is a French region (whose most famous export is the wine which bears its name).
答案中，将句子改成了(Well-informed) people know that Bordeaux is a French region (whose most famous export is the wine that bears its name).
解析中，还特意指出了which bears its name是错误的。没有规定说限定性从句就不能使用which吧？
把此处解释一并贴上来：The context of this sentence calls for an essential clause to modify the wine, since the point of the clause is to identify the wine. If the sentence ended with the wine, it would be incomplete. The clause should therefore begin with that rather than which.

eshopaholic

没有规定说限定性从句就不能使用which吧？ 这个不清楚

但GMAT SC 中的限定性从句确实没有用过which